A codelist-valued property whose value is wrapped in a gmd codelist element (e.g. <gmd:CI_RoleCode codeListValue="processor">processor</gmd:CI_RoleCode>) carries its value in the element text, not in an xlink:href. Add a focused decoder test asserting such a property decodes from the text content even when its schema declares a codelist constraint — which on its own would route an xlink:href as the value — and add that codelist constraint to the role property of the existing full-tree decode fixture so the broader test guards the same path.